Pakistan's former Prime Minister Imran Khan was taken to hospital in Islamabad late on Tuesday for medical treatment and returned to prison, sources said. Khan's lawyers say the 74-year-old's health has deteriorated in prison and that he has lost significant vision in his right eye. The cricketer-turned-politician has faced multiple corruption charges since he lost power in a no-confidence vote in 2022, and has been in prison for more than three years.